Visible-light active, heterogeneous, and metal-free photocatalysts represent a more sustainable and environmentally friendly alternative to conventional metal-based photocatalysts. Highly ordered mesoporous polymers (OMPs) with tunable periodic structures, ordered and uniform mesopores, and excellent stability can become a promising platform for heterogeneous photocatalysis of organic transformations. Here we report the preparation of triphenylamine (TPA) functionalized ordered mesoporous polymers (TPA-MPs) through a facile and cost-effective process. The new three-dimensional connected networks possess periodic porosity, excellent stability and good photoelectric response characteristics. Among them, TPA-MP-1 was selected as the optimized heterogeneous photocatalyst for visible-light driven cross coupling of glycine derivatives with indoles and synthesis of 2-substituted benzothiazoles using oxygen in air as a green oxidant. In addition, the TPA-MP-1 catalyst can be easily recovered with good retention of photocatalytic activity and reused at least five times, demonstrating its good recyclability. This work highlights the opportunity in constructing a new generation of metal-free, heterogeneous photocatalysts for organic transformations.

中文翻译：

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用于无金属光催化好氧氧化的三苯胺基有序介孔聚合物的直接合成

可见光活性、非均相和无金属光催化剂代表了比传统金属基光催化剂更可持续和环保的替代品。高度有序的介孔聚合物（OMPs）具有可调谐的周期结构、有序且均匀的介孔以及优异的稳定性，可以成为有机转化的非均相光催化的有前景的平台。在这里，我们报告了通过简便且具有成本效益的工艺制备三苯胺 (TPA) 官能化有序介孔聚合物 (TPA-MPs)。新的三维连通网络具有周期性孔隙率、优异的稳定性和良好的光电响应特性。其中，TPA-MP-1 被选为优化的多相光催化剂，用于可见光驱动的甘氨酸衍生物与吲哚的交叉偶联以及使用空气中的氧气作为绿色氧化剂合成 2-取代的苯并噻唑。此外，TPA-MP-1催化剂易于回收，具有良好的光催化活性保持性，可重复使用至少5次，证明了其良好的可回收性。这项工作突出了构建用于有机转化的新一代无金属非均相光催化剂的机会。